Canadian Tire review: Security guard checked my bag without any reason and I felt so embarrassed

I went to Canadian tire regent branch (store#270) on Saturday March,09,2024 to buy headlight bulb for my car. I came directly from my work after my shift so I was in my uniform and I had my back pack as well. I found the bulb and went to the register # 6 at 14:23. I paid for bulb under the transaction # 251, operator #2706 and float: 001. The young security guard was standing beside that till close to the exit door and demanded to show my bag to him. He checked my bag without any reason and told me that my bag is ok and I am free to go but it was so embarrassing for me because I was in my city uniform and people around me were looking at me. Firstly, I thought that it was his job so I let him check my bag but I couldn’t sleep that night and decided not to go to any branch of Canadian tire in future. I used to buy a lot of stuff from this store and was taking my both cars to fix there but now I am done with this store. I couldn’t understand that why he chose me to check my bag without any reason even he could clearly see that I was in my city uniform and city hired me for reason. That was all I remember and at last Good bye Canadian tire!